How I Met Your Mother even features a couple of cool voice-only cameos from sports figures Jim Nantz and Phil Simms, both prominent members of CBS’ on-air sports departments.

Continue below for assorted spoilers and preview videos.

How I Met Your Mother | 8pm

Rabbit or Duck: Robing gets a party invite from an annoying co-worker, and Lily and Marshall fix Ted up with one of Barney’s many castoffs when they forget to find him a more appropriate Valentine’s Day blind date. Will the lucky rejected woman end up being the title mother? Who knows at this late stage, five seasons in… (CBS hasn’t posted any related clips.)

Accidentally on Purpose | 8:30pm

Back to School: While Billie worries that she’s no match for Zack’s gorgeous ex when she barges in at his high school reunion, Abby and Olivia attempt to get people to buy some alleged “youth juice” that Abby is selling. The promo follows.

Two and a Half Men | 9pm

Aye, Aye, Captain: The huge Green-Eyed Monster constantly looking over Charlie’s shoulder threatens to sabotage his relationship with Chelsea. Check out the promo below.

The Big Bang Theory | 9:30pm

The Large Hadron Collision: Since he’s only allowed to bring one guest, Leonard must decide who to take with him on a Valentine’s Day trip to Switzerland to see the largest and highest energy particle accelerator in the world, CERN’s Large Hadron Collider. A sneak peek and promo for the episode follow.

Post from: Comedy Centric

And I bet Penny is going to be thrilled during the action, too.

Why? Because when Sheldon gets it into his head that he absolutely must solve a certain physics problem, his strategy for achieving that goal involves him becoming Penny’s colleague at her long-time Cheesecake Factory job. If he scores a waiter gig, I feel sooo sorry for the diners at his tables.

Take a look at both a sneak peek and a promo for “The Einstein Approximation” below.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

And featured on Accidentally on Purpose and Two and a Half Men are guest stars Michael Rapaport (My Name is Earl) and Stacy Keach (Titus), respectively.

Continue reading for details and preview clips.

Accidentally on Purpose | 8:30pm

The Rock: Rapaport, who just happens to be the brother of the comedy’s executive producer Claudia Lonow, reprises his role as sports writer Sully. When Billie collaborates with Sully on an article, she learns some interesting news about their newspaper. Also, Zack and Davis decide to start a business that focuses on sandwiches. The promo for “The Rock” follows.

Two and a Half Men | 9pm

Yay, No Polyps!: Prison Break alum Keach drops by TV’s most popular sitcom to play Chelsea’s father Tom. Although Charlie avoids visiting him and Chelsea’s bigoted mother Martha (Meagen Fay of Malcolm in the Middle) by scheduling a colonoscopy instead, he gets a not-so-nice surprise when he returns home to find them inside. The promo for “Yay, No Polyps!” follows.

The Big Bang Theory | 9:30pm

The Bozeman Reaction: Poor Leonard and Sheldon! After the roommates’ apartment becomes the scene of a robbery, they enlist their buddies to help create a high-tech security system. The promo for “The Bozeman Reaction” follows.

Post from: Comedy Centric

McKellar stops by to portray Abby, a potential romantic interest for adorable yet woman-shy Koothrappali. I hope he gets really lucky.

Apparently, Koothrappali encounters lovely Abby when he and Sheldon go to a university social gathering. Elsewhere, poor Leonard becomes irked when he learns that Penny is partial to psychics, which doesn’t surprise me in the least on both counts.

Sneak a really quick peek at “The Psychic Vortex” in the following promo clip, and tune in later at 9:30pm ET to catch the full episode.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

And Beverly is one powerful parent indeed.

While her visit makes Sheldon insanely happy, it also mortifies her poor son.

Check out a sneak peek and short promo for “The Maternal Congruence” below. The second video shows exactly why Sheldon loves his roommate’s mom so much. Yikes!

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

In an attempt to help Penny better appreciate what Leonard does for a living…

Sheldon decides to try to teach her about his job, which means teaching her physics. Uh-huh. We’ll see ’bout that.

Also, Wolowitz catches a case of the green-eyed monster when Leonard begins spending time with his new girlfriend.

Check out the promo for “The Gorilla Experiment” below.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

The actress many know best as Starbuck makes a cameo appearance as the woman of Wolowitz’s dreams, which isn’t exactly an enviable position.

The rest of the plot concerns Wolowitz’s attempts to not destroy his budding relationship with Bernadette (Melissa Rauch, Kath & Kim), while Sheldon is consumed with destroying Kripke (John Ross Bowie, Reno 911!) after an embarrassing incident involving National Public Radio.

A short promo for “The Vengeance Formulation” follows.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

When everyone’s favorite resident female is injured…

…she’s forced to depend on Sheldon’s help while Leonard, Howard, and Raj are off on a desert camping trip.

Check out a preview and promo for “The Adhesive Duck Deficiency” below. CBS sure is being generous with the videos this week, so enjoy.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

The lovers in question are Leonard and Penny, of course.

When the couple has a disagreement that inconveniences Sheldon, he steps in to set things right. So, cross your fingers he doesn’t just make the situation worse, especially considering Sheldon’s notorious lack of normal-people skills.

Take a look at the “Guitarist Amplification” promo below.

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric

While the world’s most non-athletic dude ever teaches Leonard a thing or two about…

…football, Howard and Raj’s friendship begins to buckle under the enormous weight of a kite fight, whatever that is.

Watch a promo and a preview for “The Cornhusker Vortex” in the following videos. Nice kites!

The Big Bang Theory airs Mondays on CBS at 9:30pm ET.

Post from: Comedy Centric